ICB1FL02G Datasheet, PDF (30/37 Pages) Infineon Technologies AG – Smart Ballast Control IC for Fluorescent Lamp Ballasts

ICB1FL02G
7.2 Design Equations of a Ballast Application
Subsequent the design equations are listed:
Start-up resistors R11, R12:
Application Examples
R11 + R12
=
-V-----I--N-----M------I--N----
IVCCqu2
=
-1-2-5--0-0--0--_µ--V--A---
=
1, 33MΩ
Selected value: R11= 470k; R12= 470k
Current limitation resistor R13 of PFC zero current detector (PFCZCD).
The additional factor 2 is used in order to keep away from limit value.
Selected value: R13= 33k.
R13 = -I--P----F-V--C--B---Z--U--C--S--D---^â‹---N_â‹---N--S---P-E---R-C---I--^â‹_{M---2----â‹}---1-- = _{4--4--m-1---0-A--V----â‹}--^â‹-1--1-2--3-8---^â‹-_â‹--2-1-- = 20, 8kΩ
PFC Voltage sense resistor R20:
Selected value: R20= 10k.
R20 ≤ _{1---0---0-----â‹}---VI--P--R--F---E-C---F-B-----I--A-----S-- = -1--0---0--2---^,â‹---52---0_,---5V---_µ----A--- = 10kΩ
PFC Voltage sense resistors R14, R15:
R14 + R15
=
V-----B----U-----S-----–-----V----R-----E----F--
VREF
⋅
R20
=
-4--1---0----V---2---–_,---5-⁽--V-2---^,---5---V-----⁾ ⋅ 10k
=
1630 k Ω
Selected values: R14= 820k; R15= 820k
Low pass capacitor C11:
Selected corner frequency f_C1= 10kHz.
C11 = -2----_â‹---_π---1--_â‹--^â‹-f--⁽_{C--R---1--2--â‹}-0--R--+--2---R0----1-_â‹--4-₍--R--+--1---R4----1-+--5---R⁾----1---5---₎- = _2-----â‹---_π-----_â‹-1--1---0^â‹---⁽_{k--1--H-0----zk----â‹}^{+---1--8-0--2-k--0---}_â‹-k--₍--8+---2--8-0--2--k-0---+k----⁾-8---2---0---k----₎ = 1, 60nF
Selected value C3= 2,2nF
PFC Shunt resistors R18, R19:
-R-----1---8----^â‹---R----1---9---
R18 + R19
=
V-----P----F----C----C-----S---O-----4F----F_⋅---P--⋅_--O-η_----U-⋅_{---VT----PI---N-F----AC-----C----M------I--N------}⋅_-------2--
=
1----V------⋅_---0---,_{--4-9---5⋅---5-}⋅_{--5-1---W8---0----V------}⋅_-------2-
=
1, 1 Ω
Selected values: R18= 2,2Ohm; R19= 2,2Ohm
Datasheet Version 1.2
30
February 2006